VS-32-L
25
7.1.7.
Closing strap gripper 2
After reaching and maintaining the strap tension the solenoid valve
Y5
is selected.
The sealing motor
M3
moves 105° and moves switch ring 2
(52)
to
pos. W
.
The clamping
(47)
grips both straps; simultaneously, gas valve
Y10
is switched
on. Then, the strap fed is cut and pressed flexibly by means of the welded torch
holder
(59)
. The closed strap gripper 2 is signalled via switch ring 2 by means of
switch
B4
. Simultaneously, a timer element
t1
is processed which switches off the
tensioning motor
M2
after the cutting and pressing of the strap.
7.1.8.
Welding
After reaching
pos. W
the TIG automatic torches are ignited consecutively and
seal both ends of the strap. If no ignition of the first welding point, the 2
nd
welding
point will be set and the 1
st
will be repeated.
Welding time
t5
and welding intensity
t6
can be set in the control electronics.
Usually, a welding time of 1 to 1,5 s each at an intensity of current of approx. 160
A is satisfactory. The quantity of gas at the welding station should be set to 10
l/min (for setting see section 8.5). The time of the gas after-flow was set to 8 s by
the manufacturer.
The tip of the electrode should project 2 mm out of the gas nozzle. The distance
between electrode and strapping material should be 3 mm (for setting, see
sections 8.6 and 8.7).
7.1.9.
Swivelling the welding station open
When the straps have been welded, the solenoid valve
Y5
is switched on, the
sealing motor runs 160° to
pos. F
. In that situation switch ring 2 is assigned to
switch
B4
. The welding station swivels open by the curve
(14)
and releases the
welding seal.
7.1.10.
Swivelling the welding station back
When the seal applies to the packing item, the strapping head can be moved to its
initial position. Simultaneously, the strapping material is retracted from the cutting
area. The sealing motor
M3
is switched on and operates until the
0 position
of
the head has been reached. The tensile springs
(116)
close the welding station.
Switch ring 1
(55)
then occupies switch
B3.
- A new strapping cycle may begin. -
B 13 GB 33/06